Add OVERRIDE to ui/.

ui/base/animation/multi_animation.h

Index: ui/base/animation/multi_animation.h
diff --git a/ui/base/animation/multi_animation.h b/ui/base/animation/multi_animation.h
index ff4cd5dbee17492b598b8702bd769b80afae41b7..240c6da691f819fe4477f51d9b3fbc815cd0f293 100644
--- a/ui/base/animation/multi_animation.h
+++ b/ui/base/animation/multi_animation.h
@@ -55,15 +55,15 @@ class UI_EXPORT MultiAnimation : public Animation {
 
   // Returns the current value. The current value for a MultiAnimation is
   // determined from the tween type of the current part.
-  virtual double GetCurrentValue() const;
+  virtual double GetCurrentValue() const OVERRIDE;
 
   // Returns the index of the current part.
   size_t current_part_index() const { return current_part_index_; }
 
  protected:
   // Animation overrides.
-  virtual void Step(base::TimeTicks time_now);
-  virtual void SetStartTime(base::TimeTicks start_time);
+  virtual void Step(base::TimeTicks time_now) OVERRIDE;
+  virtual void SetStartTime(base::TimeTicks start_time) OVERRIDE;
 
  private:
   // Returns the part containing the specified time. |time_ms| is reset to be